Device for automatically unrolling the paper ribbon in morse apparatus.



N0. 710,667. I Patented Oct. 7, 1902 L. CEREBOTANI. DEVICE FOR AUTOMATICALLY UNBOLLING THE PAPER RIBBON 1N MORSE APPARATUS.

(Application filed Nov. 27, 1901.

(No Model.)

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UNITED STATES PATENT OFFICE.

LUIGI CEREBOTANI, OF MUNICH, GERMANY, ASSIGNOR OF ONE-HALE TO JOH. FRIEDR. \VALLMANN & (10., OF BERLIN, GERMANY.

DEVICE FOR AUTOMATICALLY UNROLLING THE PAPER RIBBON IN MORSE APPARATUS.

SPECIFICATION forming part of Letters Patent No. 710,667, dated October 7, 1902.

Application filed November 2'7, 1901. $erial No. 83,916. (No model.)

,9 all whom it may concern.-

Be it known that 1, LUIGI CEREBOTANI, a subject of the King of Bavaria, residing at Munich, in the Kingdom of Bavaria, in the German Empire, have invented new and useful Improvements in Devices for Automatically Unrolling the Paper Ribbon in Morse Apparatus, of which the following is a specification.

The subject of the present invention is a device for use with the ordinary Morse apparatus whereby the paper ribbon is unrolled automatically without the assistance of the receiving ofiicial. The operation is such that not only is the ribbon advanced at the commencement of telegraphing, but also during the process quite independently of the duration of the message and the speed of telegraphing until the transmitting official stops the operation.

The essential feature of the invention consists in the arrangement of an electromagnet on the Morse apparatus which by the aid of a local battery stands in such connection with a polarized relay that on the arrival of currents of a certain directione. 9., positive currents-an armature disengages the stop of the clockwork which controls the movement of the paper ribbon and maintains the disengagement until on arrival of a current of opposite direction the clockwork is stopped again.

One form of construction of the invention is shown on the accompanying drawing.

M is an ordinary Morse apparatus. At the back of the same an electromagnet E is provided externally, and response of this electromagnet causes attraction of the armature a, which is ordinarily held apart from the electromagnet by means of a spring 20. Hereupon the pin ,2 will be set free by the pawl 70, having its fulcrum at c and pivoted at b to an arm rigidly secured to the armature and moving in a guide (Z. The pin ,2 is the same as that in the ordinary Morse apparatus, which is controlled by a lever similar to the pawl for the purpose of releasing the wheel e, which receives its rotation from the spring of the clockwork. It is, however, arranged in opposite direction.

Next the Morse apparatus M is located a polarized magnet P R, similar to the induction-bell magnets. This magnet is inserted in the line-circuit. If, therefore, a line-current arrives in one direction, the armature d, pivoted at 19, will incline to one side. If the line-current arrives in the opposite direction, the armature will incline to the opposite side. One arm of the armature d closes the circuit of a local current L 0 through the contactpiece on when this arm is attracted by the bobbin Zthat is, when a current of a certain directione. g., positive-arrives. The already-mentioned electromagnet E lies in the circuit of the battery L O, and the course'of the current is as follows: :0, m, d, 4, E, 2,1

At the transmitting station S there are merely the ordinary key T and a circuit-closing button F. By means of the key T a currentfrom battery B is sentsay apositivecun rent-and passes through B, T, g, L, 1", (which is wound in opposite direction to the coil Z) 1, 3, e to earth. Through the contact-button F a current of opposite direction (negative) is sent from battery B, which likewise passes through the circuit above mentioned-B,F,q, L, &c. From this results: First, simultaneously with commencement of telegraphing at the receiving-station the paper ribbon unrolls through the manipulation by the transmitting operator; second, the unrolling is stopped likewise by the operator at the transmitter. If the armature d is in the position shown in the drawing, the local circuit L O is broken at m, and consequently the electromagnet E will not respond. The pawl 70 operates and prevents rotation of the wheel, so that the paper ribbon is not advanced. If, however, a message is sent-2'. 6., it the key T is depressed-the first effect at the Morse apparatus M at the receiving-station is the advance of the paper, since on arrival of the first impulse of current from B the armature (1 tips, whereby the electromagnet E is brought into the circuit L 0, so that the pawl 7o releases the pin .2, and the clockwork can unroll the paper ribbon. This unrolling can only be stopped by cutting out the electromagnet E, which latter can only be effected by the arrival of a current from the battery B, for the armature (1 remains tilted whether the current continues to flow from the battery B or not and will only tip in the contrary direction when a negative current changes the polarity of l r. lVhile now the first current impulse from the battery B results in the uninterrupted advance of the paper, the same current impulse and those following from B will cause response of the electromagnet e, whereby the Morsesigns transmitted by the key T are printed on the advancing paper. When the telegraphing operation by means of the key T is concluded, the paper would unroll further if a negative current from B did not arrive. For this reason the button F is provided next to the key T, and this button must be depressed on conclusion of telegraphing. The current will now pass from battery B through F, g, L, as already mentioned, and simultaneously (1' will tip in reverse direction, with momentary response of the electr0magnete,When unrolling will cease. For the purpose of insuring certain operation of the negative current depression of the button F can of course be repeated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

In combination with a Morse apparatus, a

device for automatically unrolling the paper ribbon, comprising an electromagnet E, an armature a for same, a spring-actuated pivoted pawl k jointed to said armature, a stop 2 controlling the motion of the paper-unrolling mechanism and capable of being engaged by said pawl, in combination with a polarized relay P R contained in the line-circuit, a double-armed lever-armature d for said relay connected to said electromagnet E, a local battery L 0 connected at one pole to said electromagnet, the connection to the latter pole being capable of being closed by said armature d, and in combination with a transmitting apparatus consisting of a key T and a contact-button F contained in the line-circuit, and batteries B B in said key and contactbutton branches respectively, all arranged substantially as and for the purposes described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

LUIGI CEREBOTANI.

Witnesses:

MARIE -VAGENRAUFT, RUDO PH W. HIEBL. 

